Schumaker vs TTI Headers

What size tubes and collector on the TTI's.

440-200 headers. 2" primary, 3.5 collectors. Exhaust is TTI 3" front to back with an H pipe and Borla XR-1 SS mufflers. It goes right to the bumpers with double rolled slash cut tips. The factory tips are restrictive and also change the sound do to their size and design.